Question 3 a) Derive from the first principles the steady flow energy equation for an open system. [10] b) A system receives 0.756kg/s of fluid at a velocity of 36.58m/s at an elevation of 30.48m. At the exit, at an elevation of 54.86m, the fluid leaves at a velocity of 12.19m/s. The specific enthalpies of the entering and exiting fluid are 2791.2kJ/kg and 2795.9kJ/kg respectively. If the work done by the system is 5.101kW, calculate the heat supplied. [7] c) A turbine in a certain steam plant develops 1100kW worth of power. The heat supplied to the steam in the boiler is 3000kJ/kg, the heat rejected by the system to cooling water in the condenser is 2100kJ/kg and the feed pump work required to pump the condensate back into the boiler is 10kW. Calculate the steam flow round the cycle in terms of mass flow rate. [8] [Total = 25marks]

a) Derive from the first principles the steady flow energy equation for an open system. [10] b) A system receives 0.756kg/s of fluid at a velocity of 36.58m/s at an elevation of 30.48m. At the exit, at an elevation of 54.86m, the fluid leaves at a velocity of 12.19m/s. The specific - enthalpies of the entering and exiting fluid are 2791.2kJ/kg and 2795.9kJ/kg respectively. If the work done by the system is 5.101kW, calculate the heat supplied. [7] c) A turbine in a certain steam plant develops 1100kW worth of power. The heat supplied to the steam in the boiler is 3000kJ/kg, the heat rejected by the system to cooling water in the condenser is 2100kJ/kg and the feed pump work required to pump the condensate back into the boiler is 10kW. Calculate the steam flow round the cycle in terms of mass flow rate. [Total=25marks]